A technological investigation at Sforza Castle found that it does in fact hold underground passages once described by Leonardo da Vinci.

An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to exist. Ground-penetrating radar and laser scanning revealed that the historic passages made famous by a Leonardo da Vinci drawing is just one of multiple tunnel sections.

Beneath Sforza Castle in Milan, researchers have discovered a series of secret tunnels—passageways once sketched by the Renaissance artist and scientist Leonardo da Vinci and traversed by a widower sick with grief.

For centuries, whispers of hidden tunnels beneath Milan’s iconic Sforza Castle have intrigued historians and treasure hunters alike.

One of the discoveries is a tunnel that connects the Sforza Castle to the nearby church of Santa Maria delle Grazie, which has long been the subject of legends and speculation.

As per the Politecnico di Milano, the investigation has “revealed the presence of numerous underground passages under the Sforza Castle.”

New research uncovered hidden passages under Sforza Castle, potentially confirming legends linked to Leonardo da Vinci’s designs. As part of a PhD thesis, the Politecnico di Milano conducted an advanced technological survey in collaboration with the Sforza Castle,

Archaeologists Blown Away After Finding Secret Tunnels That Da Vinci Had Drawn Over 500 Years Ago Researchers from the Polytechnic Institute of Milan visited the site of Italy’s famed Sforza Castle as part of a doctoral thesis and conducted a technological study.